import java.net.*;
import java.io.*;

public class Server{
	PrintWriter valja1;
	PrintWriter valja2;
	BufferedReader sisse1;
	BufferedReader sisse2;

	public Server(){
		try{ServerSocket ss= new ServerSocket(3001);
			while(true){
				Socket sc1=ss.accept();
	    		valja1=new PrintWriter(sc1.getOutputStream(), true);
   	 		sisse1=new BufferedReader(new InputStreamReader(sc1.getInputStream()));
				Socket sc2=ss.accept();
	    		valja2=new PrintWriter(sc2.getOutputStream(), true);
   	 		sisse2=new BufferedReader(new InputStreamReader(sc2.getInputStream()));
			   while(true){ 
			   	String rida1=sisse1.readLine();
			   	valja2.println(rida1); 
			   	System.out.println(rida1);
		  	 //	String rida2=sisse2.readLine();
				  // valja1.println(rida2); 
			   }
			}
		}catch(IOException e){
			System.out.println("Viga "+e);
		}
	}
	
	public static void main(String args[]){
		new Server();
	}
}